Blog

How many atoms are in 5.80 moles of He? 1.0mol = 6.02 x 1023 atoms

In the reaction of nitrogen gas,N2 , with hydrogen gas,H2 , to form ammonia gas, NH3, how many moles of hydrogen are needed to react with 2 moles of nitrogen? N2 +3H2 ——> 2NH3

How many moles of Cu are in 1.48 × 1025 Cu atoms? 1.0mol = 6.02 x 1023 atoms. Show your work.

The molar mass of C3H8O2 is ________. Given MW: C = 12.00g/mol; H = 1.008g/mol; O = 16.00g/mol

How many grams of MgO (MW = 40.3g/mol) are produced when 40.0 grams of O2 (MW = 32.0g/mol) react completely with Mg? Show your work 2Mg + O2 → 2MgO

What element is undergoing reduction (if any) in the following reaction? CH4(g) + 2O2(g) → CO2(g) + 2 H2O(g)

What element is undergoing oxidation (if any) in the following reaction? Mg(s) + 2AgNO3(aq) → Mg(NO3)2(aq) + 2Ag(s)

How many compounds have polar bonds but are nonpolar overall as a molecule H2O, CO2, CF4, SO2, SO3?  You need to explain your reasonings to support your answer for the credits

Translation from the decoy uORF is more likely to occur in:

The presence of lambda repressor in an infected E. coli cell most directly requires: